York S1-7710-3281 Limit Switch and M8400 models

and M8400 models

The male nut should be tightened finger-tight and then given an additional 1/4 turn with a 7/16-inch wrench

Industrial Durability: Features a corrosion-resistant aluminum canister and 1/4-inch quick-connect terminals for fast field installation

this PTAC temperature sensor features a plug-and-play connector for swift field installation

York S1-7710-3281 Limit Switch and M8400 modelsThe York S1 7710 3281 is a critical 105 85F fan limit switch engineered for precise thermal management within residential and light commercial air handlers and furnaces. As a genuine OEM York part, this bimetal sensor ensures the blower fan activates once the heat exchanger reaches the 105F cut in point and deactivates after cooling to the 85F cut out. This specific temperature differential is vital for preventing short cycling and optimizing latent